Chair backrest



FIG. 1 is a perspective view of a chair backrest in accordance with the new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a perspective view of a second embodiment of the chair backrest in accordance with the new design having portions with a brushed/metallic finish which is the sole difference between it and FIGS. 1–6;

FIG. 8 is a perspective view of a third embodiment of the chair backrest in accordance with the new design having no specific width, which is the sole difference between it and FIGS. 1–6;

FIG. 9 is a perspective view of a fourth embodiment of the chair backrest in accordance with the new design having a tubular construction which is the sole difference between it and FIGS. 1–6; and,

FIG. 10 is a cross-sectional view taken along line 10—10 in FIG. 9.

The broken lines in the figures are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a chair backrest, as shown and described. 